# US 5,347,242 A · Superconducting accelerating tube comprised of half-cells connected by ring shaped elements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,347,242 A - Document ID: US5347242A - Status: Granted - Kind: A - Application number: 07/927,277 - Filed: 1992-09-21 - Granted: 1994-09-13 - Earliest claimed: 1992-09-21 - Assignees: Furukawa Electric Co., Ltd. - Inventors: Takashi Shimano; Misao Sakano; Shinichi Mukoyama - Web page: https://patentgrep.com/patent/US5347242A ## CPC - H05H 7/20: with superconductive walls - Y10S 505/866: Wave transmission line, network, waveguide, or microwave storage device - H05H: PLASMA TECHNIQUE (apparatus or processes specially adapted for producing X-rays H05G2/00); PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A superconducting accelerating tube which is constructed by welding and connecting a plurality of half cells (11) formed of superconductor material in a dish form having a substantially constant wall thickness of the material, and having a small-diameter portion (11a) and a large-diameter portion (11b) and in which the shell diameter periodically varies. The half cells (11) are welded together via ring-shaped connecting members (12) formed of superconducting material and disposed between the small-diameter portions (11a), and the half cell (11) and connecting member (12) are formed of Nb. ## Claims ### Claim 1 A superconducting accelerating tube comprising: a plurality of half cells, each half cell being comprised of a superconductor material is a dish form and each half cell having a substantially constant thickness; each half cell having a generally circular periphery and having a small-diameter portion and a large-diameter portion, and wherein each half cell has a shell diameter which varies between the small-diameter portion and the large-diameter portion; the respective large-diameter portions of adjacent half cells being connected together; and a respective ring-shaped connecting member, comprised of a superconductor material, interposed between said small-diameter portions of adjacent half cells, said adjacent half cells each having a welded connection to portions of said ring-shaped connecting members such that said adjacent half cells are connected together via said respective ring-shaped connecting member with said ring-shaped connecting member disposed between said small-diameter portions. ### Claim 2 (depends on 1) The superconducting accelerating tube of claim 1, wherein said superconductor material of said respective ring-shaped connecting member is Nb. ### Claim 3 (depends on 2) The superconducting accelerating tube of claim 2, wherein said respective ring-shaped connecting member has a layer of Nb.sub.3 Sn on an internal surface thereof. ### Claim 4 (depends on 2) The superconducting accelerating tube of claim 2, wherein said respective ring-shaped connecting member has a layer of NbN on an internal surface thereof. ### Claim 5 (depends on 1) The superconducting accelerating tube of claim 1, wherein the material of each of said half cells has a thickness in a range between 0.1 mm and 1 mm. ### Claim 6 (depends on 1) The superconducting accelerating tube of claim 1, wherein said small-diameter portions of said adjacent cells are connected by the respective welded connection to opposite side portions of said ring-shaped connecting members. ### Claim 7 (depends on 1) The superconducting accelerating tube of claim 1, wherein said large-diameter portion of adjacent half cells are connected together via a respective welded connection. ### Claim 8 (depends on 1) The superconducting accelerating tube of claim 1, wherein the large-diameter portion of each of said half cells has an inner diameter, and the material of each of said half cells has a thickness of not less than 1/800 of the inner diameter of the large-diameter portion thereof. ### Claim 9 (depends on 1) The superconducting accelerating tube of claim 1, wherein said superconductor material of each of said half cells is Nb. ### Claim 10 (depends on 9) The superconducting accelerating tube of claim 9, wherein each of said half cells has a layer of Nb.sub.3 Sn on an internal surface thereof. ### Claim 11 (depends on 10) The superconducting accelerating tube of claim 10, wherein the large-diameter portion of each of said half cells has an inner diameter, and the material of each of said half cells has a thickness of not less than 1/800 of the inner diameter of the large-diameter portion thereof. ### Claim 12 (depends on 10) The superconducting accelerating tube of claim 10, wherein said superconductor material of said respective ring-shaped connecting member is Nb. ### Claim 13 (depends on 10) The superconducting accelerating tube of claim 10, wherein the material of each of said half cells has a thickness in a range between 0.1 mm and 1 mm. ### Claim 14 (depends on 9) The superconducting accelerating tube of claim 9, wherein each of said half cells has a layer of NbN on an internal surface thereof. ### Claim 15 (depends on 14) The superconducting accelerating tube of claim 14, wherein said superconductor material of said respective ring-shaped connecting member is Nb. ### Claim 16 (depends on 14) The superconducting accelerating tube of claim 14, wherein the large-diameter portion of each of said half cells has an inner diameter, and the material of each of said half cells has a thickness of not less than 1/800 of the inner diameter of the large-diameter portion thereof. ### Claim 17 (depends on 14) The superconducting accelerating tube of claim 14, wherein the material of each of said half cells has a thickness in a range between 0.1 mm and 1 mm. ### Claim 18 (depends on 9) The superconducting accelerating tube of claim 9, wherein said superconductor material of said respective ring-shaped connecting member is Nb. ### Claim 19 (depends on 9) The superconducting accelerating tube of claim 9, wherein the large-diameter portion of each of said half cells has an inner diameter, and the material of each of said half cells has a thickness of not less than 1/800 of the inner diameter of the large-diameter portion thereof. ### Claim 20 (depends on 9) The superconducting accelerating tube of claim 9, wherein the material of each of said half cells has a thickness in a range between 0.1 mm and 1 mm.